CVE-2026-43986
CriticalCVSS 9.9Exploitation Probability (EPSS)
Low risk18th percentile - higher than 18% of all known CVEs
Summary
Tautulli versions prior to 2.17.1 expose a public `/image/<hash>` route that resolves attacker-controlled entries from `image_hash_lookup` and replays them through server-side image fetch logic. A low-privilege guest user can seed a malicious external image URL into this lookup table and trigger server-side fetches through an unauthenticated endpoint, turning an authenticated SSRF primitive into a persistent unauthenticated SSRF gadget.
Risk Assessment
An attacker can exploit this vulnerability to make HTTP requests to internal network resources, potentially leading to data theft or further system compromise.
Recommendation
Upgrade Tautulli to version 2.17.1 or later immediately, which includes a fix for this vulnerability.
Original NVD description (English source)
Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 expose a public `/image/<hash>` route that resolves attacker-controlled entries from `image_hash_lookup` and replays them through the same server-side image fetch logic used by authenticated image proxying. A low-privilege guest user can seed a malicious external image URL into this lookup table and then trigger server-side fetches through a fully unauthenticated endpoint. This turns an authenticated SSRF primitive into a persistent unauthenticated SSRF gadget. Once the malicious hash entry exists, any external user can request `/image/<hash>.png` and cause the PMS or Tautulli host to fetch an arbitrary attacker-chosen URL. Version 2.17.1 patches the issue.